A rare Kawasaki minibike, the MB1 was also known as the Coyote.
Kawi actually made two versions of this bike – the MB1 (featured today) was a two-stroker, but the KT-30 (50cc unit) was apparently under-powered (3 horsepower) and not reliable. After approximately 400 units, Kawasaki quickly replaced it with a 134cc four stroke engine. For a lot more information on this rare find, check out this page dedicated to the Coyote on Mini Doodle.
http://jleibovitch.tripod.com/id258.htm
This example is claimed to be in beautiful shape and it runs great, though there’s a slight tear in the seat stitching and some discoloration/rust from age. Find this Coyote for sale in Jefferson City, Missouri with bidding up to $2,001